BEARINGDEXCylindrical roller, NJ
NJ315 bearing
75 mm bore, 160 mm outside diameter, 37 mm width (2.9528 × 6.2992 × 1.4567 in).
Dimensions
| mm | inch | |
|---|---|---|
| Bore d | 75 | 2.9528 |
| Outside diameter D | 160 | 6.2992 |
| Width B | 37 | 1.4567 |
Quick numbers
| Pitch diameter dm | 117.5 mm |
| Section height (D − d)/2 | 42.5 mm |
| n·dm at 1,800 rpm | 211,500 |
| n·dm at 3,600 rpm | 423,000 |
Compare against the maker's limiting speed. Speed calculator · L10 life
What the number means
NJCylindrical roller. One rib on the inner ring locates the shaft in one direction.
3Diameter series 3: medium
15Bore code 15 × 5 = 75 mm
Same size, different bearing
These share the 75 × 160 × 37 mm envelope but carry load differently. They aren't drop-in swaps.